Intel 8XC251SQ, 8XC251SA, 8XC251SP, 8XC251SB, Embedded Microcontroller manual Index-4

8XC251SA, SB, SP, SQ USER’S MANUAL

detection, 6-3 edge-triggered, 6-4 enable/disable, 6-5 exiting idle mode, 12-5 exiting powerdown mode, 12-6 external, 6-3, 6-11

global enable, 6-5

instruction completion time, 6-10 latency, 6-9–6-13 level-triggered, 6-4

PCA, 6-5 polling, 6-9, 6-10 priority, 6-1, 6-3, 6-4, 6-7 priority within level, 6-7 processing, 6-9–6-15 request, See Interrupt request response time, 6-9, 6-10 sampling, 6-3, 6-10

serial port, 6-5

service routine (ISR), 6-4, 6-9, 6-14, 6-15 sources, 6-3

timer/counters, 6-4 vector cycle, 6-14 vectors, 3-3, 6-4

INTR bit

and RETI instruction, 4-16, 5-16

IPH0, 3-17, 3-18, 6-3, 6-8, 6-14, C-2, C-3, C-15 bit definitions, 6-7

IPL0, 3-17, 3-18, 6-3, 6-8, 6-14, C-2, C-3, C-16 bit definitions, 6-7

ISR, See Interrupts, service routine

J

JB instruction, 5-14, A-24

JBC instruction, 5-14, A-24

JC instruction, A-24

JE instruction, A-24

JG instruction, A-24

JLE instruction, A-24

JMP instruction, A-24

JNB instruction, 5-14, A-24

JNC instruction, A-24

JNE instruction, A-24

JNZ instruction, A-24

JSG instruction, A-25

JSGE instruction, A-25

JSL instruction, A-24

Index-4

JSLE instruction, A-25 Jump instructions

bit-conditional, 5-14 compare-conditional, 5-14 unconditional, 5-15

JZ instruction, A-24

K

Key bytes, See Encryption array

L

Latency, 6-9

LCALL instruction, 5-15, A-24 LJMP instruction, 5-15, A-24 Lock bits

programming and verifying, 14-1, 14-7 protection types, 14-8

setup for programming and verifying, 14-4– 14-5

Logical instructions, 5-9 table of, A-17

M

MCS 251 microcontroller, 2-1 core, 2-4

features, 2-1

MCS 51 microcontroller, 2-1 Memory space, 2-4, 3-1, 3-5–3-10

compatibility, See Compatibility (MCS 251 and MCS 51 architectures)

regions, 3-2, 3-5 reserved locations, 3-5

Miller effect, 11-5

MOV instruction, A-19, A-20, A-21 for bits, 5-11, A-23

MOVC instruction, 3-2, 5-10, A-21 Move instructions

table of, A-19

MOVH instruction, 5-10, A-21 MOVS instruction, 5-10, A-21 MOVX instruction, 3-2, 5-10, A-21 MOVZ instruction, 5-10, A-21 MUL instruction, 5-9 Multiplication, 5-9